CodeGenModule.cpp revision 761d7f78e2dac7ea5f35828c2271e60d91e106ce
15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- CodeGenModule.cpp - Emit LLVM Code from ASTs for a Module --------===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// This coordinates the per-module state used while generating code. 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 14e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta#include "CGDebugInfo.h" 155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "CodeGenModule.h" 165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "CodeGenFunction.h" 170dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar#include "CGCall.h" 18af2f62ce32e462f256855cd24b06dec4755d2827Daniel Dunbar#include "CGObjCRuntime.h" 195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/AST/ASTContext.h" 20c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 212c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner#include "clang/Basic/Diagnostic.h" 228bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman#include "clang/Basic/SourceManager.h" 235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/TargetInfo.h" 24ec9426ca6039279bcc99bc2c625bb2abe4f0353dNate Begeman#include "llvm/CallingConv.h" 25bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner#include "llvm/Module.h" 265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "llvm/Intrinsics.h" 2720ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov#include "llvm/Target/TargetData.h" 28a1945fa74d04098d7e22d7c31585342555eca928Chris Lattner#include "llvm/Analysis/Verifier.h" 295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace CodeGen; 315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris LattnerCodeGenModule::CodeGenModule(ASTContext &C, const LangOptions &LO, 34fb97b03e42d397405f617be0252be83e77a66f6eChris Lattner llvm::Module &M, const llvm::TargetData &TD, 35f77ac86f4eca528a04b817d7ad7f045a47d52712Daniel Dunbar Diagnostic &diags, bool GenerateDebugInfo) 36fb97b03e42d397405f617be0252be83e77a66f6eChris Lattner : Context(C), Features(LO), TheModule(M), TheTargetData(TD), Diags(diags), 37208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar Types(C, M, TD), Runtime(0), MemCpyFn(0), MemMoveFn(0), MemSetFn(0), 380c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman CFConstantStringClassRef(0) { 39208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar 40208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (Features.ObjC1) { 41f77ac86f4eca528a04b817d7ad7f045a47d52712Daniel Dunbar if (Features.NeXTRuntime) { 42208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar Runtime = CreateMacObjCRuntime(*this); 43208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar } else { 44208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar Runtime = CreateGNUObjCRuntime(*this); 45208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar } 46c17a4d3b16a2624a76de5d7508805534545bd3bfDaniel Dunbar } 47e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta 48e8b9f5b8ea60983c4a74cb8b63879616b914b65aSanjiv Gupta // If debug info generation is enabled, create the CGDebugInfo object. 49815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek DebugInfo = GenerateDebugInfo ? new CGDebugInfo(this) : 0; 502b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 512b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner 522b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris LattnerCodeGenModule::~CodeGenModule() { 53815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete Runtime; 54815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek delete DebugInfo; 55815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek} 56815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenek 57815c78fd9ab8bd5dfe8e8a91b8c6a413e2b8c889Ted Kremenekvoid CodeGenModule::Release() { 5820ff3108fcd2c3bd734dc79efc22ebaa090abd41Anton Korobeynikov EmitStatics(); 59219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar EmitAliases(); 60208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (Runtime) 61208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar if (llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction()) 62208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar AddGlobalCtor(ObjCInitFunction); 636bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalCtors, "llvm.global_ctors"); 646bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar EmitCtorList(GlobalDtors, "llvm.global_dtors"); 65532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman EmitAnnotations(); 66a1945fa74d04098d7e22d7c31585342555eca928Chris Lattner // Run the verifier to check that the generated code is consistent. 67219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar if (verifyModule(TheModule, llvm::PrintMessageAction)) { 68219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar TheModule.dump(); 69219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar assert(0 && "Module failed verification!"); 70219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } 712b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner} 725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 73488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 742c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner/// specified stmt yet. 7590df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type, 7690df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 7790df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 7890df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 79488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 802c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner "cannot codegen this %0 yet"); 812c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner SourceRange Range = S->getSourceRange(); 822c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner std::string Msg = Type; 839c728dc4d8da89c73fcae74c9e72d7a83ffd7b6dTed Kremenek getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID, 847a9d49fd2bfac00e905b361ba76d26ab5b6c3b09Ted Kremenek &Msg, 1, &Range, 1); 852c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner} 8658c3f9ec11cbe852a518bf2f83af46f938b7b852Chris Lattner 87488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar/// ErrorUnsupported - Print out an error that codegen doesn't support the 88c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner/// specified decl yet. 8990df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbarvoid CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type, 9090df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar bool OmitOnError) { 9190df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar if (OmitOnError && getDiags().hasErrorOccurred()) 9290df4b6661968a84bf64baee489bb2f6d948fcc1Daniel Dunbar return; 93488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Error, 94c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner "cannot codegen this %0 yet"); 95c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner std::string Msg = Type; 96c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID, 97c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner &Msg, 1); 98c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner} 99c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 10041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// setGlobalVisibility - Set the visibility for the given LLVM 10141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// GlobalValue according to the given clang AST visibility value. 10241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarstatic void setGlobalVisibility(llvm::GlobalValue *GV, 10341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar VisibilityAttr::VisibilityTypes Vis) { 1044f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman switch (Vis) { 1054f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman default: assert(0 && "Unknown visibility!"); 1064f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman case VisibilityAttr::DefaultVisibility: 1074f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman GV->setVisibility(llvm::GlobalValue::DefaultVisibility); 1084f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman break; 1094f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman case VisibilityAttr::HiddenVisibility: 1104f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman GV->setVisibility(llvm::GlobalValue::HiddenVisibility); 1114f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman break; 1124f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman case VisibilityAttr::ProtectedVisibility: 1134f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman GV->setVisibility(llvm::GlobalValue::ProtectedVisibility); 1144f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman break; 1154f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman } 1164f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman} 1174f8d123e3e2c260de3377208106ddba87cee28b4Dan Gohman 1186d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// AddGlobalCtor - Add a function to the list that will be called before 1196d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner/// main() runs. 1206bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalCtor(llvm::Function * Ctor, int Priority) { 1216d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner // TODO: Type coercion of void()* types. 1226bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalCtors.push_back(std::make_pair(Ctor, Priority)); 1236d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 1246d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 1256bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// AddGlobalDtor - Add a function to the list that will be called 1266bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar/// when the module is unloaded. 1276bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::AddGlobalDtor(llvm::Function * Dtor, int Priority) { 1286bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // TODO: Type coercion of void()* types. 1296bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalDtors.push_back(std::make_pair(Dtor, Priority)); 1306bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar} 1316bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 1326bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbarvoid CodeGenModule::EmitCtorList(const CtorList &Fns, const char *GlobalName) { 1336bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Ctor function type is void()*. 1346bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::FunctionType* CtorFTy = 1356bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::FunctionType::get(llvm::Type::VoidTy, 1366bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<const llvm::Type*>(), 1376bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar false); 1386bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::Type *CtorPFTy = llvm::PointerType::getUnqual(CtorFTy); 1396bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 1406bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Get the type of a ctor entry, { i32, void ()* }. 141572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::StructType* CtorStructTy = 1426bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::StructType::get(llvm::Type::Int32Ty, 1436bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::PointerType::getUnqual(CtorFTy), NULL); 1446bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 1456bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar // Construct the constructor and destructor arrays. 1466bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> Ctors; 1476bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar for (CtorList::const_iterator I = Fns.begin(), E = Fns.end(); I != E; ++I) { 1486bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar std::vector<llvm::Constant*> S; 1496bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar S.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, I->second, false)); 1506bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar S.push_back(llvm::ConstantExpr::getBitCast(I->first, CtorPFTy)); 1516bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar Ctors.push_back(llvm::ConstantStruct::get(CtorStructTy, S)); 1526bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar } 1536bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar 1546bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar if (!Ctors.empty()) { 1556bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::ArrayType *AT = llvm::ArrayType::get(CtorStructTy, Ctors.size()); 1566bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar new llvm::GlobalVariable(AT, false, 157572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner llvm::GlobalValue::AppendingLinkage, 1586bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar llvm::ConstantArray::get(AT, Ctors), 1596bfed7e411adc46eaf616371f85f68305c6e6257Daniel Dunbar GlobalName, 160572cf09ae8a78af1c56d40b016ec4cf1837163acChris Lattner &TheModule); 1616d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner } 1626d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner} 1636d39760673df2e92d9293f46ff8c66dad6ab5e0aChris Lattner 164532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begemanvoid CodeGenModule::EmitAnnotations() { 165532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman if (Annotations.empty()) 166532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman return; 167532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 168532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman // Create a new global variable for the ConstantStruct in the Module. 169532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::Constant *Array = 170532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(), 171532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations.size()), 172532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman Annotations); 173532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::GlobalValue *gv = 174532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman new llvm::GlobalVariable(Array->getType(), false, 175532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman llvm::GlobalValue::AppendingLinkage, Array, 176532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman "llvm.global.annotations", &TheModule); 177532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman gv->setSection("llvm.metadata"); 178532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman} 179532485cc6c078d9e51b517c6bbd8984deb17f0feNate Begeman 1800dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbarstatic void SetGlobalValueAttributes(const Decl *D, 1810dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar bool IsInternal, 1820dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar bool IsInline, 183219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar llvm::GlobalValue *GV, 184219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar bool ForDefinition) { 185d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes // TODO: Set up linkage and many other things. Note, this is a simple 186d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes // approximation of what we really want. 187219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar if (!ForDefinition) { 188219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // Only a few attributes are set on declarations. 1890dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar if (D->getAttr<DLLImportAttr>()) 1900dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar GV->setLinkage(llvm::Function::DLLImportLinkage); 191219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } else { 192219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar if (IsInternal) { 193219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar GV->setLinkage(llvm::Function::InternalLinkage); 194219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } else { 195219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar if (D->getAttr<DLLImportAttr>()) 196219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar GV->setLinkage(llvm::Function::DLLImportLinkage); 197219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar else if (D->getAttr<DLLExportAttr>()) 198219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar GV->setLinkage(llvm::Function::DLLExportLinkage); 199219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar else if (D->getAttr<WeakAttr>() || IsInline) 200219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar GV->setLinkage(llvm::Function::WeakLinkage); 201219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } 2020dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar } 203d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 2040dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar if (const VisibilityAttr *attr = D->getAttr<VisibilityAttr>()) 20541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar setGlobalVisibility(GV, attr->getVisibility()); 206d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes // FIXME: else handle -fvisibility 207a735ad8be5536a1cd3e9817ec27dfeb2a0c1d5caDaniel Dunbar 2080dbe227feccf6a8dbadfff8ca3f80416b7bf2f28Daniel Dunbar if (const AsmLabelAttr *ALA = D->getAttr<AsmLabelAttr>()) { 209a735ad8be5536a1cd3e9817ec27dfeb2a0c1d5caDaniel Dunbar // Prefaced with special LLVM marker to indicate that the name 210a735ad8be5536a1cd3e9817ec27dfeb2a0c1d5caDaniel Dunbar // should not be munged. 211a735ad8be5536a1cd3e9817ec27dfeb2a0c1d5caDaniel Dunbar GV->setName("\01" + ALA->getLabel()); 212a735ad8be5536a1cd3e9817ec27dfeb2a0c1d5caDaniel Dunbar } 213d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes} 214d4cbda6292b321c2e7dce7f039d92918fee99b3aNuno Lopes 215761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patelvoid CodeGenModule::SetFunctionAttributes(const Decl *D, 21645c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar const CGFunctionInfo &Info, 217b768807c49a1c7085def099b848631856af766faDaniel Dunbar llvm::Function *F) { 218761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeListType AttributeList; 219761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel ConstructAttributeList(D, Info.argtypes_begin(), Info.argtypes_end(), 220761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeList); 221c134fcb0d7989fe6937e47e6216637647e074aefEli Friedman 222761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(), 223761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel AttributeList.size())); 224ff4a2d9e2c1ddbf87e00e2a36ae341faf03eafb3Eli Friedman 225ff4a2d9e2c1ddbf87e00e2a36ae341faf03eafb3Eli Friedman // Set the appropriate calling convention for the Function. 22645c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar if (D->getAttr<FastCallAttr>()) 227ff4a2d9e2c1ddbf87e00e2a36ae341faf03eafb3Eli Friedman F->setCallingConv(llvm::CallingConv::Fast); 228f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 229f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 230f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar/// SetFunctionAttributesForDefinition - Set function attributes 231f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar/// specific to a function definition. 232219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbarvoid CodeGenModule::SetFunctionAttributesForDefinition(const Decl *D, 233219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar llvm::Function *F) { 234219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar if (isa<ObjCMethodDecl>(D)) { 235219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar SetGlobalValueAttributes(D, true, false, F, true); 236219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } else { 237219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar const FunctionDecl *FD = cast<FunctionDecl>(D); 238219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar SetGlobalValueAttributes(FD, FD->getStorageClass() == FunctionDecl::Static, 239219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar FD->isInline(), F, true); 240219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } 241219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 242f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar if (!Features.Exceptions) 243761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel F->addAttribute(0, llvm::Attribute::NoUnwind); 244f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 245f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 246f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbarvoid CodeGenModule::SetMethodAttributes(const ObjCMethodDecl *MD, 247f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar llvm::Function *F) { 248761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel SetFunctionAttributes(MD, CGFunctionInfo(MD, Context), F); 249f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 250219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar SetFunctionAttributesForDefinition(MD, F); 251f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar} 252f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 253f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbarvoid CodeGenModule::SetFunctionAttributes(const FunctionDecl *FD, 254f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar llvm::Function *F) { 255761d7f78e2dac7ea5f35828c2271e60d91e106ceDevang Patel SetFunctionAttributes(FD, CGFunctionInfo(FD), F); 25645c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar 257219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar SetGlobalValueAttributes(FD, FD->getStorageClass() == FunctionDecl::Static, 258219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar FD->isInline(), F, false); 259219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar} 260219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 26145c25ba11cbf8c9a461def5b03f6ee9481e06769Daniel Dunbar 262219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbarvoid CodeGenModule::EmitAliases() { 263219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar for (unsigned i = 0, e = Aliases.size(); i != e; ++i) { 264219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar const FunctionDecl *D = Aliases[i]; 265219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar const AliasAttr *AA = D->getAttr<AliasAttr>(); 266219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 267219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // This is something of a hack, if the FunctionDecl got overridden 268219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // then its attributes will be moved to the new declaration. In 269219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // this case the current decl has no alias attribute, but we will 270219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // eventually see it. 271219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar if (!AA) 272219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar continue; 273219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 274219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar const std::string& aliaseeName = AA->getAliasee(); 275219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar llvm::Function *aliasee = getModule().getFunction(aliaseeName); 276219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar if (!aliasee) { 277219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // FIXME: This isn't unsupported, this is just an error, which 278219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // sema should catch, but... 279219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar ErrorUnsupported(D, "alias referencing a missing function"); 280219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar continue; 281219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } 282219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 283219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar llvm::GlobalValue *GA = 284219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar new llvm::GlobalAlias(aliasee->getType(), 285219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar llvm::Function::ExternalLinkage, 286219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar D->getName(), 287219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar aliasee, 288219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar &getModule()); 289219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 290219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar llvm::GlobalValue *&Entry = GlobalDeclMap[D->getIdentifier()]; 291219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar if (Entry) { 292219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // If we created a dummy function for this then replace it. 293219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar GA->takeName(Entry); 294219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 295219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar llvm::Value *Casted = 296219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar llvm::ConstantExpr::getBitCast(GA, Entry->getType()); 297219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar Entry->replaceAllUsesWith(Casted); 298219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar Entry->eraseFromParent(); 299ff4a2d9e2c1ddbf87e00e2a36ae341faf03eafb3Eli Friedman 300219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar Entry = GA; 301219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } 302219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 303219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // Alias should never be internal or inline. 304219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar SetGlobalValueAttributes(D, false, false, GA, true); 305219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } 306ff4a2d9e2c1ddbf87e00e2a36ae341faf03eafb3Eli Friedman} 307ff4a2d9e2c1ddbf87e00e2a36ae341faf03eafb3Eli Friedman 3084c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begemanvoid CodeGenModule::EmitStatics() { 3094c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman // Emit code for each used static decl encountered. Since a previously unused 3104c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman // static decl may become used during the generation of code for a static 3114c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman // function, iterate until no changes are made. 3124c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman bool Changed; 3134c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman do { 3144c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman Changed = false; 3154c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman for (unsigned i = 0, e = StaticDecls.size(); i != e; ++i) { 316bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar const ValueDecl *D = StaticDecls[i]; 3176f7e2eee917a136ffc36834f020782b3f15d8fa6Eli Friedman 3186f7e2eee917a136ffc36834f020782b3f15d8fa6Eli Friedman // Check if we have used a decl with the same name 3196f7e2eee917a136ffc36834f020782b3f15d8fa6Eli Friedman // FIXME: The AST should have some sort of aggregate decls or 3206f7e2eee917a136ffc36834f020782b3f15d8fa6Eli Friedman // global symbol map. 321219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // FIXME: This is missing some important cases. For example, we 322219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // need to check for uses in an alias and in a constructor. 32390db88249ac92e6ed515065048a4ead4467e6639Daniel Dunbar if (!GlobalDeclMap.count(D->getIdentifier())) 324a735ad8be5536a1cd3e9817ec27dfeb2a0c1d5caDaniel Dunbar continue; 3256f7e2eee917a136ffc36834f020782b3f15d8fa6Eli Friedman 326bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // Emit the definition. 327bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar EmitGlobalDefinition(D); 328bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 3294c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman // Erase the used decl from the list. 3304c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman StaticDecls[i] = StaticDecls.back(); 3314c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman StaticDecls.pop_back(); 3324c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman --i; 3334c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman --e; 3344c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 3354c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman // Remember that we made a change. 3364c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman Changed = true; 3374c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 3384c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } while (Changed); 3395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3418bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the 3428bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// annotation information for a given GlobalValue. The annotation struct is 3438bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the 3443c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar/// GlobalValue being annotated. The second field is the constant string 3458bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// created from the AnnotateAttr's annotation. The third field is a constant 3468bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// string containing the name of the translation unit. The fourth field is 3478bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// the line number in the file of the annotated value declaration. 3488bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 3498bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// FIXME: this does not unique the annotation string constants, as llvm-gcc 3508bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// appears to. 3518bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman/// 3528bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begemanllvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, 3538bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const AnnotateAttr *AA, 3548bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman unsigned LineNo) { 3558bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Module *M = &getModule(); 3568bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 3578bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // get [N x i8] constants for the annotation string, and the filename string 3588bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // which are the 2nd and 3rd elements of the global annotation structure. 3598bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman const llvm::Type *SBP = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 3608bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *anno = llvm::ConstantArray::get(AA->getAnnotation(), true); 3618bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *unit = llvm::ConstantArray::get(M->getModuleIdentifier(), 3628bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman true); 3638bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 3648bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // Get the two global values corresponding to the ConstantArrays we just 3658bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // created to hold the bytes of the strings. 3668bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *annoGV = 3678bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman new llvm::GlobalVariable(anno->getType(), false, 3688bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue::InternalLinkage, anno, 3698bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman GV->getName() + ".str", M); 3708bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // translation unit name string, emitted into the llvm.metadata section. 3718bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue *unitGV = 3728bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman new llvm::GlobalVariable(unit->getType(), false, 3738bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::GlobalValue::InternalLinkage, unit, ".str", M); 3748bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 3758bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman // Create the ConstantStruct that is the global annotion. 3768bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::Constant *Fields[4] = { 3778bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::ConstantExpr::getBitCast(GV, SBP), 3788bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::ConstantExpr::getBitCast(annoGV, SBP), 3798bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::ConstantExpr::getBitCast(unitGV, SBP), 3808bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman llvm::ConstantInt::get(llvm::Type::Int32Ty, LineNo) 3818bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman }; 3828bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman return llvm::ConstantStruct::get(Fields, 4, false); 3838bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman} 3848bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 385bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobal(const ValueDecl *Global) { 386bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar bool isDef, isStatic; 387bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 388bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Global)) { 389219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // Aliases are deferred until code for everything else has been 390219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar // emitted. 391219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar if (FD->getAttr<AliasAttr>()) { 392219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar assert(!FD->isThisDeclarationADefinition() && 393219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar "Function alias cannot have a definition!"); 394219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar Aliases.push_back(FD); 395219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar return; 396219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } 397219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 398219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar isDef = FD->isThisDeclarationADefinition(); 399bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar isStatic = FD->getStorageClass() == FunctionDecl::Static; 400bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } else if (const VarDecl *VD = cast<VarDecl>(Global)) { 401bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(VD->isFileVarDecl() && "Cannot emit local var decl as global."); 402bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 403bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar isDef = !(VD->getStorageClass() == VarDecl::Extern && VD->getInit() == 0); 404bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar isStatic = VD->getStorageClass() == VarDecl::Static; 405bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } else { 406bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(0 && "Invalid argument to EmitGlobal"); 4074c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman return; 4084c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman } 4094c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 410bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // Forward declarations are emitted lazily on first use. 411bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar if (!isDef) 41288a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner return; 413bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 414bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // If the global is a static, defer code generation until later so 415bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // we can easily omit unused statics. 416bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar if (isStatic) { 417bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar StaticDecls.push_back(Global); 418bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar return; 419bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 420bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 421bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // Otherwise emit the definition. 422bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar EmitGlobalDefinition(Global); 4234c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman} 4244c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman 425bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalDefinition(const ValueDecl *D) { 426bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 427bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar EmitGlobalFunctionDefinition(FD); 428bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 429bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar EmitGlobalVarDefinition(VD); 430bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } else { 431bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar assert(0 && "Invalid argument to EmitGlobalDefinition()"); 432bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 433bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 434bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 4359986eabd4423d867262c358ca62f94a60ac58412Daniel Dunbar llvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D) { 43677ba708819285931932ecd33691a672bb59d221aEli Friedman assert(D->hasGlobalStorage() && "Not a global variable"); 43777ba708819285931932ecd33691a672bb59d221aEli Friedman 438bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar QualType ASTTy = D->getType(); 439bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar const llvm::Type *Ty = getTypes().ConvertTypeForMem(ASTTy); 4409986eabd4423d867262c358ca62f94a60ac58412Daniel Dunbar const llvm::Type *PTy = llvm::PointerType::get(Ty, ASTTy.getAddressSpace()); 441bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 4423c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 44390db88249ac92e6ed515065048a4ead4467e6639Daniel Dunbar llvm::GlobalValue *&Entry = GlobalDeclMap[D->getIdentifier()]; 4443c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar if (!Entry) 4453c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar Entry = new llvm::GlobalVariable(Ty, false, 4463c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar llvm::GlobalValue::ExternalLinkage, 4473c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar 0, D->getName(), &getModule(), 0, 4483c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar ASTTy.getAddressSpace()); 4493c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar 4509986eabd4423d867262c358ca62f94a60ac58412Daniel Dunbar // Make sure the result is of the correct type. 4519986eabd4423d867262c358ca62f94a60ac58412Daniel Dunbar return llvm::ConstantExpr::getBitCast(Entry, PTy); 452bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 453bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 454bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D) { 4558f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner llvm::Constant *Init = 0; 45677ba708819285931932ecd33691a672bb59d221aEli Friedman QualType ASTTy = D->getType(); 45777ba708819285931932ecd33691a672bb59d221aEli Friedman const llvm::Type *VarTy = getTypes().ConvertTypeForMem(ASTTy); 45877ba708819285931932ecd33691a672bb59d221aEli Friedman 4598f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner if (D->getInit() == 0) { 460cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // This is a tentative definition; tentative definitions are 461cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // implicitly initialized with { 0 } 462cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman const llvm::Type* InitTy; 463cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman if (ASTTy->isIncompleteArrayType()) { 464cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // An incomplete array is normally [ TYPE x 0 ], but we need 465cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // to fix it to [ TYPE x 1 ]. 466cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman const llvm::ArrayType* ATy = cast<llvm::ArrayType>(VarTy); 467cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman InitTy = llvm::ArrayType::get(ATy->getElementType(), 1); 468cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman } else { 469cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman InitTy = VarTy; 470cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman } 471cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman Init = llvm::Constant::getNullValue(InitTy); 47277ba708819285931932ecd33691a672bb59d221aEli Friedman } else { 473bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar Init = EmitConstantExpr(D->getInit()); 4748f32f7189b12f67aa4a19bc7c3855b599980eca0Chris Lattner } 47577ba708819285931932ecd33691a672bb59d221aEli Friedman const llvm::Type* InitType = Init->getType(); 4768e53e720b3d7c962e91138a130dbd5d6c2def0e5Devang Patel 47790db88249ac92e6ed515065048a4ead4467e6639Daniel Dunbar llvm::GlobalValue *&Entry = GlobalDeclMap[D->getIdentifier()]; 4783c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar llvm::GlobalVariable *GV = cast_or_null<llvm::GlobalVariable>(Entry); 4793c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar 48077ba708819285931932ecd33691a672bb59d221aEli Friedman if (!GV) { 48177ba708819285931932ecd33691a672bb59d221aEli Friedman GV = new llvm::GlobalVariable(InitType, false, 48277ba708819285931932ecd33691a672bb59d221aEli Friedman llvm::GlobalValue::ExternalLinkage, 48377ba708819285931932ecd33691a672bb59d221aEli Friedman 0, D->getName(), &getModule(), 0, 48477ba708819285931932ecd33691a672bb59d221aEli Friedman ASTTy.getAddressSpace()); 4853c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar } else if (GV->getType() != 4863c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar llvm::PointerType::get(InitType, ASTTy.getAddressSpace())) { 48777ba708819285931932ecd33691a672bb59d221aEli Friedman // We have a definition after a prototype with the wrong type. 48877ba708819285931932ecd33691a672bb59d221aEli Friedman // We must make a new GlobalVariable* and update everything that used OldGV 48977ba708819285931932ecd33691a672bb59d221aEli Friedman // (a declaration or tentative definition) with the new GlobalVariable* 49077ba708819285931932ecd33691a672bb59d221aEli Friedman // (which will be a definition). 49177ba708819285931932ecd33691a672bb59d221aEli Friedman // 49277ba708819285931932ecd33691a672bb59d221aEli Friedman // This happens if there is a prototype for a global (e.g. "extern int x[];") 49377ba708819285931932ecd33691a672bb59d221aEli Friedman // and then a definition of a different type (e.g. "int x[10];"). This also 49477ba708819285931932ecd33691a672bb59d221aEli Friedman // happens when an initializer has a different type from the type of the 49577ba708819285931932ecd33691a672bb59d221aEli Friedman // global (this happens with unions). 496cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // 497cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // FIXME: This also ends up happening if there's a definition followed by 498cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // a tentative definition! (Although Sema rejects that construct 499cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // at the moment.) 50077ba708819285931932ecd33691a672bb59d221aEli Friedman 50177ba708819285931932ecd33691a672bb59d221aEli Friedman // Save the old global 50277ba708819285931932ecd33691a672bb59d221aEli Friedman llvm::GlobalVariable *OldGV = GV; 50377ba708819285931932ecd33691a672bb59d221aEli Friedman 50477ba708819285931932ecd33691a672bb59d221aEli Friedman // Make a new global with the correct type 50577ba708819285931932ecd33691a672bb59d221aEli Friedman GV = new llvm::GlobalVariable(InitType, false, 50677ba708819285931932ecd33691a672bb59d221aEli Friedman llvm::GlobalValue::ExternalLinkage, 50777ba708819285931932ecd33691a672bb59d221aEli Friedman 0, D->getName(), &getModule(), 0, 50877ba708819285931932ecd33691a672bb59d221aEli Friedman ASTTy.getAddressSpace()); 50977ba708819285931932ecd33691a672bb59d221aEli Friedman // Steal the name of the old global 51077ba708819285931932ecd33691a672bb59d221aEli Friedman GV->takeName(OldGV); 51177ba708819285931932ecd33691a672bb59d221aEli Friedman 51277ba708819285931932ecd33691a672bb59d221aEli Friedman // Replace all uses of the old global with the new global 51377ba708819285931932ecd33691a672bb59d221aEli Friedman llvm::Constant *NewPtrForOldDecl = 51477ba708819285931932ecd33691a672bb59d221aEli Friedman llvm::ConstantExpr::getBitCast(GV, OldGV->getType()); 51577ba708819285931932ecd33691a672bb59d221aEli Friedman OldGV->replaceAllUsesWith(NewPtrForOldDecl); 51677ba708819285931932ecd33691a672bb59d221aEli Friedman 51777ba708819285931932ecd33691a672bb59d221aEli Friedman // Erase the old global, since it is no longer used. 51877ba708819285931932ecd33691a672bb59d221aEli Friedman OldGV->eraseFromParent(); 51977ba708819285931932ecd33691a672bb59d221aEli Friedman } 52077ba708819285931932ecd33691a672bb59d221aEli Friedman 5213c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar Entry = GV; 5229e32d4b4a7270a9701b7cb454381eeaa4cc42a77Devang Patel 5238bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) { 5248bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman SourceManager &SM = Context.getSourceManager(); 5258bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman AddAnnotation(EmitAnnotateAttr(GV, AA, 5268bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman SM.getLogicalLineNumber(D->getLocation()))); 5278bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman } 5288bd4afeb876fd0015bb808eb2f3de1fe709658a7Nate Begeman 52988a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner GV->setInitializer(Init); 530b381aac9bae6d608c72267dd0ed08ec6369e94e4Nuno Lopes GV->setConstant(D->getType().isConstant(Context)); 531ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner 532cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman // FIXME: This is silly; getTypeAlign should just work for incomplete arrays 533cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman unsigned Align; 534c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner if (const IncompleteArrayType* IAT = 535c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner Context.getAsIncompleteArrayType(D->getType())) 536cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman Align = Context.getTypeAlign(IAT->getElementType()); 537cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman else 538cd5f4aaf0c219189878126d556f35e38fdb8afa1Eli Friedman Align = Context.getTypeAlign(D->getType()); 53908d7802a406ee4a7cc18e8fce0c137b8c410ea7cEli Friedman if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) { 54008d7802a406ee4a7cc18e8fce0c137b8c410ea7cEli Friedman Align = std::max(Align, AA->getAlignment()); 54108d7802a406ee4a7cc18e8fce0c137b8c410ea7cEli Friedman } 54208d7802a406ee4a7cc18e8fce0c137b8c410ea7cEli Friedman GV->setAlignment(Align / 8); 54308d7802a406ee4a7cc18e8fce0c137b8c410ea7cEli Friedman 544ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner if (const VisibilityAttr *attr = D->getAttr<VisibilityAttr>()) 54541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar setGlobalVisibility(GV, attr->getVisibility()); 546ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner // FIXME: else handle -fvisibility 547a735ad8be5536a1cd3e9817ec27dfeb2a0c1d5caDaniel Dunbar 548a735ad8be5536a1cd3e9817ec27dfeb2a0c1d5caDaniel Dunbar if (const AsmLabelAttr *ALA = D->getAttr<AsmLabelAttr>()) { 549a735ad8be5536a1cd3e9817ec27dfeb2a0c1d5caDaniel Dunbar // Prefaced with special LLVM marker to indicate that the name 550a735ad8be5536a1cd3e9817ec27dfeb2a0c1d5caDaniel Dunbar // should not be munged. 551a735ad8be5536a1cd3e9817ec27dfeb2a0c1d5caDaniel Dunbar GV->setName("\01" + ALA->getLabel()); 552a735ad8be5536a1cd3e9817ec27dfeb2a0c1d5caDaniel Dunbar } 55388a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner 55488a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner // Set the llvm linkage type as appropriate. 5558fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner if (D->getStorageClass() == VarDecl::Static) 5568fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner GV->setLinkage(llvm::Function::InternalLinkage); 5578fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner else if (D->getAttr<DLLImportAttr>()) 558ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLImportLinkage); 559ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner else if (D->getAttr<DLLExportAttr>()) 560ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::Function::DLLExportLinkage); 5618fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner else if (D->getAttr<WeakAttr>()) 562ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner GV->setLinkage(llvm::GlobalVariable::WeakLinkage); 5638fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner else { 564ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner // FIXME: This isn't right. This should handle common linkage and other 565ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner // stuff. 566ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner switch (D->getStorageClass()) { 5678fabd78f1976243cb223fb3e969c6f317d1ae44dChris Lattner case VarDecl::Static: assert(0 && "This case handled above"); 568ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner case VarDecl::Auto: 569ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner case VarDecl::Register: 570ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner assert(0 && "Can't have auto or register globals"); 571ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner case VarDecl::None: 572ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner if (!D->getInit()) 573a07b76419a03f126c22949dce2e546ba4df0e415Eli Friedman GV->setLinkage(llvm::GlobalVariable::CommonLinkage); 574ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner break; 575ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner case VarDecl::Extern: 576ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner case VarDecl::PrivateExtern: 577ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner // todo: common 578ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner break; 579ddee4231e9bdfbac1e1f5385ff1a17fd0e0b0e39Chris Lattner } 58088a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner } 581686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta 582686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta // Emit global variable debug information. 583686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta CGDebugInfo *DI = getDebugInfo(); 584686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta if(DI) { 585686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta if(D->getLocation().isValid()) 586686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta DI->setLocation(D->getLocation()); 587686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta DI->EmitGlobalVariable(GV, D); 588686226b538e72c5059ab7c9a8f87eb883193b645Sanjiv Gupta } 58988a69ad80e1550e9932666e6efa050a5b1223889Chris Lattner} 5905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 591bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarllvm::GlobalValue * 592bd012ff1fa088181646a784f385b28867372d434Daniel DunbarCodeGenModule::EmitForwardFunctionDefinition(const FunctionDecl *D) { 593219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar const llvm::Type *Ty = getTypes().ConvertType(D->getType()); 594219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar llvm::Function *F = llvm::Function::Create(cast<llvm::FunctionType>(Ty), 595219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar llvm::Function::ExternalLinkage, 596219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar D->getName(), &getModule()); 597219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar SetFunctionAttributes(D, F); 598219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar return F; 599bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 600bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 601bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfFunction(const FunctionDecl *D) { 6029986eabd4423d867262c358ca62f94a60ac58412Daniel Dunbar QualType ASTTy = D->getType(); 6039986eabd4423d867262c358ca62f94a60ac58412Daniel Dunbar const llvm::Type *Ty = getTypes().ConvertTypeForMem(ASTTy); 6049986eabd4423d867262c358ca62f94a60ac58412Daniel Dunbar const llvm::Type *PTy = llvm::PointerType::get(Ty, ASTTy.getAddressSpace()); 6053c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar 6063c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // Lookup the entry, lazily creating it if necessary. 60790db88249ac92e6ed515065048a4ead4467e6639Daniel Dunbar llvm::GlobalValue *&Entry = GlobalDeclMap[D->getIdentifier()]; 6083c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar if (!Entry) 6093c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar Entry = EmitForwardFunctionDefinition(D); 610bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 6119986eabd4423d867262c358ca62f94a60ac58412Daniel Dunbar return llvm::ConstantExpr::getBitCast(Entry, PTy); 612bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 613bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 614bd012ff1fa088181646a784f385b28867372d434Daniel Dunbarvoid CodeGenModule::EmitGlobalFunctionDefinition(const FunctionDecl *D) { 61590db88249ac92e6ed515065048a4ead4467e6639Daniel Dunbar llvm::GlobalValue *&Entry = GlobalDeclMap[D->getIdentifier()]; 6163c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar if (!Entry) { 617bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar Entry = EmitForwardFunctionDefinition(D); 618bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } else { 6193c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar // If the types mismatch then we have to rewrite the definition. 6203c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar const llvm::Type *Ty = getTypes().ConvertType(D->getType()); 6213c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar if (Entry->getType() != llvm::PointerType::getUnqual(Ty)) { 622bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // Otherwise, we have a definition after a prototype with the wrong type. 623bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // F is the Function* for the one with the wrong type, we must make a new 624bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // Function* and update everything that used F (a declaration) with the new 625bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // Function* (which will be a definition). 626bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // 627bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // This happens if there is a prototype for a function (e.g. "int f()") and 628bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // then a definition of a different type (e.g. "int f(int x)"). Start by 629bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // making a new function of the correct type, RAUW, then steal the name. 6303c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar llvm::GlobalValue *NewFn = EmitForwardFunctionDefinition(D); 6313c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar NewFn->takeName(Entry); 632bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 633bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // Replace uses of F with the Function we will endow with a body. 634bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar llvm::Constant *NewPtrForOldDecl = 6353c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar llvm::ConstantExpr::getBitCast(NewFn, Entry->getType()); 6363c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar Entry->replaceAllUsesWith(NewPtrForOldDecl); 6373c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar 638bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar // Ok, delete the old function now, which is dead. 6393c827a79cb7d04c255db8080e682ee2c6912373dDaniel Dunbar assert(Entry->isDeclaration() && "Shouldn't replace non-declaration"); 640219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar Entry->eraseFromParent(); 641bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 642bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar Entry = NewFn; 643bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 644bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 645bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 646219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar llvm::Function *Fn = cast<llvm::Function>(Entry); 647219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar CodeGenFunction(*this).GenerateCode(D, Fn); 6486379a7a15335e0af543a942efe9cfd514a83dab8Daniel Dunbar 649219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar SetFunctionAttributesForDefinition(D, Fn); 650219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar 651219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) { 652219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalCtor(Fn, CA->getPriority()); 653219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar } else if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) { 654219df6644e2338ff067471ab0d85f27b88544ac2Daniel Dunbar AddGlobalDtor(Fn, DA->getPriority()); 655bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar } 656bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar} 657bd012ff1fa088181646a784f385b28867372d434Daniel Dunbar 658c5b8806cda286cf41866176ef98011fdaa68da01Chris Lattnervoid CodeGenModule::UpdateCompletedType(const TagDecl *TD) { 659c5b8806cda286cf41866176ef98011fdaa68da01Chris Lattner // Make sure that this type is translated. 660c5b8806cda286cf41866176ef98011fdaa68da01Chris Lattner Types.UpdateCompletedType(TD); 661d86e6bc7ab4388a578daf46e7c76be9122a25072Chris Lattner} 662d86e6bc7ab4388a578daf46e7c76be9122a25072Chris Lattner 663d86e6bc7ab4388a578daf46e7c76be9122a25072Chris Lattner 664bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner/// getBuiltinLibFunction 665bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattnerllvm::Function *CodeGenModule::getBuiltinLibFunction(unsigned BuiltinID) { 6661426fecdf90dd1986751b9940422e675880ff671Chris Lattner if (BuiltinID > BuiltinFunctions.size()) 6671426fecdf90dd1986751b9940422e675880ff671Chris Lattner BuiltinFunctions.resize(BuiltinID); 668bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 6691426fecdf90dd1986751b9940422e675880ff671Chris Lattner // Cache looked up functions. Since builtin id #0 is invalid we don't reserve 6701426fecdf90dd1986751b9940422e675880ff671Chris Lattner // a slot for it. 6711426fecdf90dd1986751b9940422e675880ff671Chris Lattner assert(BuiltinID && "Invalid Builtin ID"); 6721426fecdf90dd1986751b9940422e675880ff671Chris Lattner llvm::Function *&FunctionSlot = BuiltinFunctions[BuiltinID-1]; 673bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner if (FunctionSlot) 674bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner return FunctionSlot; 675bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 676bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner assert(Context.BuiltinInfo.isLibFunction(BuiltinID) && "isn't a lib fn"); 677bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 678bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // Get the name, skip over the __builtin_ prefix. 679bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner const char *Name = Context.BuiltinInfo.GetName(BuiltinID)+10; 680bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 681bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // Get the type for the builtin. 682bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner QualType Type = Context.BuiltinInfo.GetBuiltinType(BuiltinID, Context); 683bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner const llvm::FunctionType *Ty = 684bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner cast<llvm::FunctionType>(getTypes().ConvertType(Type)); 685bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 686bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // FIXME: This has a serious problem with code like this: 687bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // void abs() {} 688bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // ... __builtin_abs(x); 689bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // The two versions of abs will collide. The fix is for the builtin to win, 690bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // and for the existing one to be turned into a constantexpr cast of the 691bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // builtin. In the case where the existing one is a static function, it 692bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // should just be renamed. 693c5e940fa551840ecd71e8116c316c9131490f5faChris Lattner if (llvm::Function *Existing = getModule().getFunction(Name)) { 694c5e940fa551840ecd71e8116c316c9131490f5faChris Lattner if (Existing->getFunctionType() == Ty && Existing->hasExternalLinkage()) 695c5e940fa551840ecd71e8116c316c9131490f5faChris Lattner return FunctionSlot = Existing; 696c5e940fa551840ecd71e8116c316c9131490f5faChris Lattner assert(Existing == 0 && "FIXME: Name collision"); 697c5e940fa551840ecd71e8116c316c9131490f5faChris Lattner } 698bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 699bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner // FIXME: param attributes for sext/zext etc. 7004c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman return FunctionSlot = 7014c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman llvm::Function::Create(Ty, llvm::Function::ExternalLinkage, Name, 7024c13b7a3973d2d263d9682d7b68fbfeb76334af5Nate Begeman &getModule()); 703bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner} 704bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 7057acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattnerllvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, 7067acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner unsigned NumTys) { 7077acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner return llvm::Intrinsic::getDeclaration(&getModule(), 7087acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner (llvm::Intrinsic::ID)IID, Tys, NumTys); 7097acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner} 710bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattner 7115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerllvm::Function *CodeGenModule::getMemCpyFn() { 7125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (MemCpyFn) return MemCpyFn; 7135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::Intrinsic::ID IID; 714f72a44330b9d9a4b2d93e9b91cfb8ab7bd4a0643Chris Lattner switch (Context.Target.getPointerWidth(0)) { 7155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: assert(0 && "Unknown ptr width"); 7165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 32: IID = llvm::Intrinsic::memcpy_i32; break; 7175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 64: IID = llvm::Intrinsic::memcpy_i64; break; 7185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7197acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner return MemCpyFn = getIntrinsic(IID); 7205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 721c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 7220c99509927a0c7a48490486b9fec287b63e5c09cEli Friedmanllvm::Function *CodeGenModule::getMemMoveFn() { 7230c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman if (MemMoveFn) return MemMoveFn; 7240c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman llvm::Intrinsic::ID IID; 7250c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman switch (Context.Target.getPointerWidth(0)) { 7260c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman default: assert(0 && "Unknown ptr width"); 7270c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman case 32: IID = llvm::Intrinsic::memmove_i32; break; 7280c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman case 64: IID = llvm::Intrinsic::memmove_i64; break; 7290c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman } 7300c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman return MemMoveFn = getIntrinsic(IID); 7310c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman} 7320c99509927a0c7a48490486b9fec287b63e5c09cEli Friedman 73341ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venanciollvm::Function *CodeGenModule::getMemSetFn() { 73441ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio if (MemSetFn) return MemSetFn; 73541ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio llvm::Intrinsic::ID IID; 736f72a44330b9d9a4b2d93e9b91cfb8ab7bd4a0643Chris Lattner switch (Context.Target.getPointerWidth(0)) { 73741ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio default: assert(0 && "Unknown ptr width"); 73841ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio case 32: IID = llvm::Intrinsic::memset_i32; break; 73941ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio case 64: IID = llvm::Intrinsic::memset_i64; break; 74041ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio } 74141ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio return MemSetFn = getIntrinsic(IID); 74241ef30e869d3f4940437503eb6a2cf70819fdb08Lauro Ramos Venancio} 7437acda7c4a0e4aec6c003b3169ca45a5f3bc7e033Chris Lattner 7443e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar// We still need to work out the details of handling UTF-16. 7453e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar// See: <rdr://2996215> 746bef20ac367a09555b30d6eb3847a81ec164caf88Chris Lattnerllvm::Constant *CodeGenModule:: 747bef20ac367a09555b30d6eb3847a81ec164caf88Chris LattnerGetAddrOfConstantCFString(const std::string &str) { 748c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson llvm::StringMapEntry<llvm::Constant *> &Entry = 749c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson CFConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); 750c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 751c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (Entry.getValue()) 752c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson return Entry.getValue(); 753c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 7543e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zero = llvm::Constant::getNullValue(llvm::Type::Int32Ty); 7553e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *Zeros[] = { Zero, Zero }; 756c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 757c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson if (!CFConstantStringClassRef) { 758c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); 759c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = llvm::ArrayType::get(Ty, 0); 7603e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 7613e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // FIXME: This is fairly broken if 7623e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // __CFConstantStringClassReference is already defined, in that it 7633e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // will get renamed and the user will most likely see an opaque 7643e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // error message. This is a general issue with relying on 7653e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // particular names. 7663e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::GlobalVariable *GV = 767c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson new llvm::GlobalVariable(Ty, false, 768c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson llvm::GlobalVariable::ExternalLinkage, 0, 769c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson "__CFConstantStringClassReference", 770c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson &getModule()); 7713e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 7723e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar // Decay array -> ptr 7733e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar CFConstantStringClassRef = 7743e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::ConstantExpr::getGetElementPtr(GV, Zeros, 2); 775c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson } 776c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 7773e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar std::vector<llvm::Constant*> Fields(4); 7783e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 779c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Class pointer. 7803e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar Fields[0] = CFConstantStringClassRef; 781c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 782c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // Flags. 7833e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar const llvm::Type *Ty = getTypes().ConvertType(getContext().UnsignedIntTy); 7843e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar Fields[1] = llvm::ConstantInt::get(Ty, 0x07C8); 785c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 786c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String pointer. 7873e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar llvm::Constant *C = llvm::ConstantArray::get(str); 788c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson C = new llvm::GlobalVariable(C->getType(), true, 789c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson llvm::GlobalValue::InternalLinkage, 7903e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar C, ".str", &getModule()); 7913e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar Fields[2] = llvm::ConstantExpr::getGetElementPtr(C, Zeros, 2); 792c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 793c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // String length. 794c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().LongTy); 7953e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar Fields[3] = llvm::ConstantInt::get(Ty, str.length()); 796c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson 797c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson // The struct. 798c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson Ty = getTypes().ConvertType(getContext().getCFConstantStringType()); 799c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson C = llvm::ConstantStruct::get(cast<llvm::StructType>(Ty), Fields); 8000c67829763b98bc670062b553897a851fab17401Anders Carlsson llvm::GlobalVariable *GV = 8010c67829763b98bc670062b553897a851fab17401Anders Carlsson new llvm::GlobalVariable(C->getType(), true, 8020c67829763b98bc670062b553897a851fab17401Anders Carlsson llvm::GlobalVariable::InternalLinkage, 8030c67829763b98bc670062b553897a851fab17401Anders Carlsson C, "", &getModule()); 8043e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 8050c67829763b98bc670062b553897a851fab17401Anders Carlsson GV->setSection("__DATA,__cfstring"); 8060c67829763b98bc670062b553897a851fab17401Anders Carlsson Entry.setValue(GV); 8073e9df9920db8de8ec93a424b0c1784f9bff301eaDaniel Dunbar 8080c67829763b98bc670062b553897a851fab17401Anders Carlsson return GV; 809c9e2091efcb535110474434dd12015afdc3b1637Anders Carlsson} 81045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 8116143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetStringForStringLiteral - Return the appropriate bytes for a 8121e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar/// string literal, properly padded to match the literal type. 8136143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarstd::string CodeGenModule::GetStringForStringLiteral(const StringLiteral *E) { 814662174c82ef46b19a2329c7d37208e1d12dfb7b3Daniel Dunbar if (E->isWide()) { 815662174c82ef46b19a2329c7d37208e1d12dfb7b3Daniel Dunbar ErrorUnsupported(E, "wide string"); 816662174c82ef46b19a2329c7d37208e1d12dfb7b3Daniel Dunbar return "FIXME"; 817662174c82ef46b19a2329c7d37208e1d12dfb7b3Daniel Dunbar } 818662174c82ef46b19a2329c7d37208e1d12dfb7b3Daniel Dunbar 8191e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const char *StrData = E->getStrData(); 8201e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar unsigned Len = E->getByteLength(); 8211e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 8221e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar const ConstantArrayType *CAT = 8231e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar getContext().getAsConstantArrayType(E->getType()); 8241e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar assert(CAT && "String isn't pointer or array!"); 8251e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 8261e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar // Resize the string to the right size 8271e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar // FIXME: What about wchar_t strings? 8281e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar std::string Str(StrData, StrData+Len); 8291e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar uint64_t RealLen = CAT->getSize().getZExtValue(); 8301e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar Str.resize(RealLen, '\0'); 8311e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 8321e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar return Str; 8331e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar} 8341e04976fc2611d8cc06986a81deed4c42183b870Daniel Dunbar 8356143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantStringFromLiteral - Return a pointer to a 8366143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// constant array for the given string literal. 8376143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant * 8386143293fa4366ee95d7e47e61bd030a34bf68b55Daniel DunbarCodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S) { 8396143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // FIXME: This can be more efficient. 8406143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar return GetAddrOfConstantString(GetStringForStringLiteral(S)); 8416143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 8426143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 843a7ad98ff0919d6a24ea7c46634ea29bea551c1a0Chris Lattner/// GenerateWritableString -- Creates storage for a string literal. 84445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattnerstatic llvm::Constant *GenerateStringLiteral(const std::string &str, 84545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner bool constant, 8462c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner CodeGenModule &CGM) { 8476143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar // Create Constant for this string literal. Don't add a '\0'. 8486143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar llvm::Constant *C = llvm::ConstantArray::get(str, false); 84945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 85045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this string 85145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner C = new llvm::GlobalVariable(C->getType(), constant, 85245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner llvm::GlobalValue::InternalLinkage, 8532c8569d5f43f7de1fb993e84c95ea571dd9ac55eChris Lattner C, ".str", &CGM.getModule()); 8546143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 85545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner return C; 85645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 85745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 8586143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantString - Returns a pointer to a character array 8596143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// containing the literal. This contents are exactly that of the 8606143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// given string, i.e. it will not be null terminated automatically; 8616143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// see GetAddrOfConstantCString. Note that whether the result is 8626143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// actually a pointer to an LLVM constant depends on 8636143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// Feature.WriteableStrings. 8646143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// 8656143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// The result has pointer to array type. 86645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattnerllvm::Constant *CodeGenModule::GetAddrOfConstantString(const std::string &str) { 86745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Don't share any string literals if writable-strings is turned on. 86845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner if (Features.WritableStrings) 86945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner return GenerateStringLiteral(str, false, *this); 87045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 87145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner llvm::StringMapEntry<llvm::Constant *> &Entry = 87245e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner ConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]); 87345e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 87445e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner if (Entry.getValue()) 87545e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner return Entry.getValue(); 87645e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner 87745e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner // Create a global variable for this. 87845e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner llvm::Constant *C = GenerateStringLiteral(str, true, *this); 87945e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner Entry.setValue(C); 88045e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner return C; 88145e8cbdce25c2e16c7aac2036a591f6190097ae6Chris Lattner} 8826143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar 8836143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// GetAddrOfConstantCString - Returns a pointer to a character 8846143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// array containing the literal and a terminating '\-' 8856143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar/// character. The result has pointer to array type. 8866143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbarllvm::Constant *CodeGenModule::GetAddrOfConstantCString(const std::string &str) { 8879d9b09c86a8c69e8f69364f610563cdb86f2b8b7Daniel Dunbar return GetAddrOfConstantString(str + "\0"); 8886143293fa4366ee95d7e47e61bd030a34bf68b55Daniel Dunbar} 88941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 890af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// EmitObjCPropertyImplementations - Emit information for synthesized 891af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// properties for an implementation. 892af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbarvoid CodeGenModule::EmitObjCPropertyImplementations(const 893af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *D) { 894af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar for (ObjCImplementationDecl::propimpl_iterator i = D->propimpl_begin(), 895af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar e = D->propimpl_end(); i != e; ++i) { 896af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyImplDecl *PID = *i; 897af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 898af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Dynamic is just for type-checking. 899af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { 900af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCPropertyDecl *PD = PID->getPropertyDecl(); 901af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 902af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Determine which methods need to be implemented, some may have 903af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // been overridden. Note that ::isSynthesized is not the method 904af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // we want, that just indicates if the decl came from a 905af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // property. What we want to know is if the method is defined in 906af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // this implementation. 907af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!D->getInstanceMethod(PD->getGetterName())) 908af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar CodeGenFunction(*this).GenerateObjCGetter(PID); 909af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar if (!PD->isReadOnly() && 910af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar !D->getInstanceMethod(PD->getSetterName())) 911af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar CodeGenFunction(*this).GenerateObjCSetter(PID); 912af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 913af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 914af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 915af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 91641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar/// EmitTopLevelDecl - Emit code for a single top level declaration. 91741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbarvoid CodeGenModule::EmitTopLevelDecl(Decl *D) { 91841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If an error has occurred, stop code generation, but continue 91941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // parsing and semantic analysis (to ensure all warnings and errors 92041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // are emitted). 92141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (Diags.hasErrorOccurred()) 92241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar return; 92341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 92441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar switch (D->getKind()) { 92541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Function: 92641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Var: 92741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar EmitGlobal(cast<ValueDecl>(D)); 92841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 92941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 93041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::Namespace: 931662174c82ef46b19a2329c7d37208e1d12dfb7b3Daniel Dunbar ErrorUnsupported(D, "namespace"); 93241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 93341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 93441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // Objective-C Decls 93541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 93641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // Forward declarations, no (immediate) code generation. 93741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCClass: 93841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategory: 93941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCForwardProtocol: 94041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCInterface: 94141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 94241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 94341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCProtocol: 94441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar Runtime->GenerateProtocol(cast<ObjCProtocolDecl>(D)); 94541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 94641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 94741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCategoryImpl: 948af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // Categories have properties but don't support synthesize so we 949af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar // can ignore them here. 950af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 95141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar Runtime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); 95241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 95341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 954af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar case Decl::ObjCImplementation: { 955af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCImplementationDecl *OMD = cast<ObjCImplementationDecl>(D); 956af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar EmitObjCPropertyImplementations(OMD); 957af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar Runtime->GenerateClass(OMD); 95841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 959af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar } 96041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCMethod: { 96141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D); 96241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // If this is not a prototype, emit the body. 96341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (OMD->getBody()) 96441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar CodeGenFunction(*this).GenerateObjCMethod(OMD); 96541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 96641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 96741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::ObjCCompatibleAlias: 968662174c82ef46b19a2329c7d37208e1d12dfb7b3Daniel Dunbar ErrorUnsupported(D, "Objective-C compatible alias"); 96941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 97041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 97141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::LinkageSpec: { 97241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar LinkageSpecDecl *LSD = cast<LinkageSpecDecl>(D); 97341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (LSD->getLanguage() == LinkageSpecDecl::lang_cxx) 974488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar ErrorUnsupported(LSD, "linkage spec"); 97541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // FIXME: implement C++ linkage, C linkage works mostly by C 97641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // language reuse already. 97741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 97841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 97941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 98041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar case Decl::FileScopeAsm: { 98141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D); 98241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar std::string AsmString(AD->getAsmString()->getStrData(), 98341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar AD->getAsmString()->getByteLength()); 98441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 98541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar const std::string &S = getModule().getModuleInlineAsm(); 98641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar if (S.empty()) 98741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(AsmString); 98841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar else 98941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar getModule().setModuleInlineAsm(S + '\n' + AsmString); 99041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar break; 99141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 99241071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 99341071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar default: 99441071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // Make sure we handled everything we should, every other kind is 99541071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // a non-top-level decl. FIXME: Would be nice to have an 99641071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // isTopLevelDeclKind function. Need to recode Decl::Kind to do 99741071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar // that easily. 99841071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar assert(isa<TypeDecl>(D) && "Unsupported decl kind"); 99941071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar } 100041071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar} 100141071debe9b8887449c3f2ee0dd7124ed47bdda8Daniel Dunbar 1002